GB666436A - Improvements in and relating to high frequency amplifier neutralizing systems - Google Patents
Improvements in and relating to high frequency amplifier neutralizing systemsInfo
- Publication number
- GB666436A GB666436A GB15957/49A GB1595749A GB666436A GB 666436 A GB666436 A GB 666436A GB 15957/49 A GB15957/49 A GB 15957/49A GB 1595749 A GB1595749 A GB 1595749A GB 666436 A GB666436 A GB 666436A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- inductance
- screen
- amplifier
- neutralized
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
- H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
- H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge tube amplifiers
Abstract
666,436. Valve amplifying circuits. BRITISH THOMSON-HOUSTON CO., Ltd. June 15, 1949 [June 19, 1948], No. 15957/49. Class 40 (vi). In a high-frequency amplifier in which the input and output electrodes of a valve have inherent capacity coupling to a third common electrode possessing inherent inductance, the resulting coupling between the first two electrodes is neutralized over a range of frequencies by means of a two-terminal network comprising reactive elements, connected between them. As applied to a grounded-grid amplifier, Fig. 7, unwanted coupling between anode and cathode over the anode-grid and grid-cathode capacities C1, C2 respectively and due to the inherent inductance L1 of the grid lead is neutralized by means of inductance L2 and condenser C4 connected in series between the electrodes concerned. The arrangement may be used in a similar manner to neutralize the effect of screen lead inductance in a screen-grid amplifier of conventional grounded-cathode type, Fig. 8 (not shown). In a push-pull amplifier using screen-grid valves, Fig. 9, each valve is separately neutralized by means of an inductance L2 in conjunction with a pair of condensers 95; as shown, the valves have duplicated screen leads respectively decoupled to either end of the filament.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US666436XA | 1948-06-19 | 1948-06-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB666436A true GB666436A (en) | 1952-02-13 |
Family
ID=22070778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB15957/49A Expired GB666436A (en) | 1948-06-19 | 1949-06-15 | Improvements in and relating to high frequency amplifier neutralizing systems |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR987887A (en) |
| GB (1) | GB666436A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4471316A (en) * | 1981-02-10 | 1984-09-11 | Pass Matvei I | Electric oscillation generator |
-
1949
- 1949-06-08 FR FR987887D patent/FR987887A/en not_active Expired
- 1949-06-15 GB GB15957/49A patent/GB666436A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4471316A (en) * | 1981-02-10 | 1984-09-11 | Pass Matvei I | Electric oscillation generator |
Also Published As
| Publication number | Publication date |
|---|---|
| FR987887A (en) | 1951-08-20 |
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